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The present Cambridge Common forms the historic core of what had been consolidated to sixteen acres in 1724 from the enormous area for cow pasture, ox pasture, and common woodlot that stretched originally into modern Arlington. In 1636, the section of the Common closest to Harvard Square (HS1) was enclosed for the burying ground. The focal point of the present Common is the Soldiers Monument of 1869, designed by Cyrus and Darius Cobb with assistance from Thomas W. Silloway. Although considerably diminished in size from the eighteenth century, the Common is still encircled by significant early buildings: Harvard College; 7 Waterhouse Street (c. 1753), which suggests the common's colonial character; and a series of historic churches that reflect important periods of development.